Hear ye, hear ye! From ye olde 3D print shoppe... its a rattle for nerdlings!
I printed mine in two colors and assembled with a little superglue inside the rims of the mace head and pommel. For a truly baby-proof version, I'd suggest printing the second mace head (sealed) and putting the peas in while the print is about halfway there, thus entombing the rattle-y bits for all of eternity... or something.